Sea otters living along the central California coast risk higher exposure to disease-causing parasites as a consequence of the food they eat and where they feed.

But in this video from Chicago’s Shedd Aquarium, we see Mari, a sea otter, conquer a puzzle to get a treat. Judging by her speed, the otter is an old pro at this one.

"Food Choices And Location Influence California Sea Otter Exposure To Disease." ScienceDaily. ScienceDaily, 24 January 2009. <www.sciencedaily.com / releases / 2009 / 01 / 090119210537.htm>.